121121210210 has 256 divisors, whose sum is σ = 298978864128. Its totient is φ = 34109337600.

The previous prime is 121121210201. The next prime is 121121210237. The reversal of 121121210210 is 12012121121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 178908392 + ... + 178909068.

It is an arithmetic number, because the mean of its divisors is an integer number (1167886188).

Almost surely, 2^121121210210 is an apocalyptic number.

121121210210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121210210 is an abundant number, since it is smaller than the sum of its proper divisors (177857653918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121121210210 is a wasteful number, since it uses less digits than its factorization.

121121210210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121121210210 its reverse (12012121121), we get a palindrome (133133331331).

The spelling of 121121210210 in words is "one hundred twenty-one billion, one hundred twenty-one million, two hundred ten thousand, two hundred ten".